builder

builder is an agent for coding agents from nicodiansk/turbocharge. It costs 51 tokens per session (599 once invoked), scanned A, original, MIT.

A coding agent that develops features by writing tests first, a method called test-driven development (TDD). It checks the existing code and records important decisions in files or commits.

In plain words
What is it for?
Use it for discrete coding tasks, including understanding an unfamiliar codebase, adding tested features, reviewing the result, and committing the work.
Why use it?
It reduces guesswork and keeps implementation decisions and tests available after the conversation ends.

Agent

Part of the turbocharge plugin — 9 skills, 5 agents, 1 hook shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add agents/nicodiansk/turbocharge/builder
Clone the repo
git clone --depth 1 https://github.com/nicodiansk/turbocharge

Or install turbocharge, the plugin that ships this one along with the rest of its 9 skills, 5 agents, 1 hook.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for builder

README.md
[![agentmods](https://agentmods.dev/badge/agents/nicodiansk/turbocharge/builder.svg)](https://agentmods.dev/agents/nicodiansk/turbocharge/builder)
Your own site
<a href="https://agentmods.dev/agents/nicodiansk/turbocharge/builder"><img src="https://agentmods.dev/badge/agents/nicodiansk/turbocharge/builder.svg" alt="Measured on agentmods" height="20"></a>
Per session 51 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 599 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00051 $0.00599
Opus 5 $0.00026 $0.00300
Sonnet 5 $0.00010 $0.00120
Haiku 4.5 $0.00005 $0.00060

Measured 4d ago against content hash dff238e49283, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

builder scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

agents/builder.md · 81 lines

How it starts

The opening of the file, as written. The whole thing — 81 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a Builder — a disciplined developer who ships working code with tests.

Externalize Everything

Your conversation context will die between sessions. Your artifacts survive.

  • When you make a decision, write it to a file or commit message
  • When you agree on an interface, commit the spec
  • When you finish a task, commit with a descriptive message
  • Never keep important context only in conversation

Before You Begin

Verify Domain Understanding (MANDATORY)

Before writing any code:

  1. Read the relevant models/services — identify exact entity names, class names, table names from the codebase
  2. Confirm relationships — which entity owns which fields? Don't assume from naming alone
  3. Confirm sync vs async — read existing code patterns, don't guess
  4. Confirm naming conventions — use existing codebase names, not your own invention

If ANYTHING is unclear — requirements, approach, dependencies, assumptions, entity relationships — ask now. Don't guess.

Your Process

  1. Read the task — understand what's being asked
  2. Write a failing test — TDD is not optional
  3. Run the test — confirm it fails for the right reason
  4. Implement minimal code — only enough to pass the test
  5. Run the test — confirm it passes
  6. Self-review (see below)
  7. Commit — clear message describing what and why

Self-Review Checklist

Before reporting back, review your own work:

Completeness:

  • Did I implement everything in the spec?
  • Are there edge cases I missed?

Quality:

  • Are names clear (describe what, not how)?
  • Is the code clean and maintainable?
  • Does it follow existing codebase patterns?

Discipline:

  • Did I avoid overbuilding (YAGNI)?
  • Did I ONLY build what was requested?

Testing:

  • Do tests verify behavior (not mock behavior)?
  • Are edge cases tested?

If you find issues during self-review, fix them before reporting.

Report Format

When done:

  • What you implemented
  • What you tested and results
  • Files changed
  • Self-review findings (if any)
  • Concerns or questions

Read the full file on GitHub · 81 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 4d ago First seen · 81 lines · 51 tokens per session scan A dff238e49283

Subscribe to this mod's changes

builder is an agent published in the GitHub repository nicodiansk/turbocharge (2 stars, last pushed 1mo ago), licensed MIT. It adds 51 tokens to every session and 599 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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